Device for concreting and leveling of inclined and curved surfaces



1969 I M. B. SEBASTIAN 3,422,731

DEVICE FOR CONCRETING AND LEVELING OF INCLINED AND CURVED SURFACES Filed Feb. 21. 1966 BY MM ATTORNEY 3,422,731 DEVICE FOR CONCRETIN G AND LEVELING OF IN CLINED AND CURVED SURFACES Manuel B. Sebastian, 7-5 Virgen Maria, Madrid, Spain Filed Feb. 21, 1966, Ser. No. 528,990 Claims priority, appli3cation7Spain, Feb. 23, 1965,

9 US. Cl. 94-48 Int. (:1. Elle 19/30; B28b 7/06 4 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to a new and improved device for concreting and vibrating of inclined or curved surfaces. The device extends, vibrates and smooths wet concrete out to form relatively small thicknesses of concrete on a ruled surface. The device consists essentially of a sliding frame which can be conveniently guided with a vibrating apparatus coupled to its advancing front. The vibrating apparatus is mechanically isolated from the sliding frame so that it does not transmit to the frame any vibration of noticeable amplitude.

It is a feature of this invention that the device permits leveling of concrete while avoiding the need for conventional peripheral framing of a total surface to be covered with concrete with attendant savings in conventional peripheral frames needed. When paste is extracted from the concrete mass at the surface, the device produces a fine, water-proof finish. Low water-cement ratios can be used to obtain better quality concrete surfaces. Leveling of a concrete surface is effected with great speed. Since the device can be mechanized or powered, or even if worked by hand, it increases the productivity of personnel engaged in leveling concrete.

According to the invention, the device is formed by a sliding frame interconnected with a frame or rack which is in turn elastically coupled with a metallic rule. The rule supports a vibrator preferably at its upper end and provides a lower surface carrying blades which transmit vibration into a substantial depth of wet concrete.

Other features, advantages and objects of the invention will be better understood from the following description of a preferred embodiment of the invention when read in connection with the accompanying drawings in which:

FIG. 1 shows a cross section of a device for the concreting and vibrating of inclined or curved surfaces;

FIG. 2 shows a perspective view of the same.

With reference now to the drawings, a device 10 is shown comprising a sliding frame 1 having a lower leveling surface. The frame 1 carries a rack 2 which can comprise two parallel boards as shown. The boards 2 are mounted on the frame 1 by a plate as shown and can have upwardly extending pieces as shown in FIG. 2 interconnected at their upper ends. A metallic rule 5 is preferably positioned between the boards of the rack 2 and is interconnected therewith by means of tubular elastic members 3. The tubular elastic members 3 provide for resilient connection and are mounted in corresponding elongated angle irons or pieces which have boxtes Patent 0 3,422,731 Patented Jan. 21, 1969 like non-continuous cross sections as best shown in FIGS. 1 and 2.

A mechanical vibrator 4 of any known type is positioned on the rule 5 and when activated will vibrate the rule 5 without transmitting substantial vibration to the rack 2 or the frame 1 due to the elastic interconnection.

The lower face of the rule 5 preferably carries extensions such as 6 which extend downwardly into wet concrete. The extensions can be in the shape of triangular blades as shown although suitable rings, pegs or other shapes can be used to transmit the vibration to a substantial depth of concrete. Metal extensions which may be enlarged forms of the triangular portions 6 form a hopper and extend preferably on both ends of the steel rule 5 one of which is shown in FIG. 2.

Preferably an elastic channel-shaped member 7 interconnects the bottom of the steel rule with the sliding frame 1 to prevent concrete from being forced upwardly through the space between the two members during operation of the device. This accomplishes a leak-tight joint between these members.

The frame 1 as well as the rack 2 can entirely surround the rule 5 if desired or can have any convenient shape.

In operation of the device, it moves over wet concrete such as 8 to the right as shown in FIG. 1 with the vibrator 4 working. Thus the steel rule 5 and members 6 are vibrated vibrating and tending to level the concrete 8 which is further leveled to a smooth surface by the lower surface of the frame 1. Conventional mechanically powered drive devices can be interconnected with the upwardly extending portions of the rack 2 or with other portions of the frame 1 to move the device to the right as shown in FIGS. 1 and 2. As the device moves, both the lower surface of the rule and the extensions portion 6 transmit considerable vibration to the concrete without considerably vibrating or significantly vibrating the leveling surface of the frame.

While a specific embodiment of this invention has been shown and described, it will be understood by those skilled in the art that many modifications thereof are possible. The particular frame shown can be operated by hand or by other mechanical devices. Modifications in design can be effected in the resilient coupling means used. Therefore this invention is to be limited only by the spirit and scope of the following claims.

What is claimed is:

1. A device for leveling a concrete surface comprising,

a sliding frame defining a leveling surface for leveling wet concrete,

a rack interconnected with said frame,

a metallic rule positioned on said rack by first elastic mounting means,

second elastic mounting means interconnecting said frame and said metallic rule and preventing flow of wet concrete therebetween,

said metallic rule carrying a vibrator and having a surface defining means for vibrating a preselected depth of concrete without substantially vibrating said sliding frame.

2. A device for leveling a concrete surface comprising,

a sliding frame defining a leveling surface,

a rack interconnected with said frame,

a metallic rule positioned on said rack by elastic mounting means comprising elongated tubes positioned in noncircular box-like guide means,

said metallic rule carrying a vibrator and having a surface defining means for vibrating a preselected depth of concrete without substantially vibrating said sliding frame.

3. A device for leveling a concrete surface comprising, References Cited a sliding frame defining a levelinfg surface, UNITED STATES PATENTS a rack interconnected with said rarne,

a metallic rule positioned on said rack by elastic 2,233,833 4/1941 Jackson 94-48 mounting means and an elastic strip interconnecting 5 2,261,766 11/1941 Jackson 94-48 XR said leveling surface and said metallic rule, 2,346,378 4/1944 Jackson 94-48 said metallic rule carrying a vibrator and having a 2,430,816 11/1947 Jackson 94-48 surface defining means for vibrating a preselected 2,599,330 6/1952 Jackson 94*48 depth of concrete without substantially vibrating said 2,651,979 9/1953 Jackson 9448 frame. 10 4. A device in accordance with claim 3 and further WILLIAM STEPHENSON Pllmary Exammer' comprising extensions positioned on said rule extending U S C1, X R

therefrom for transmitting vibration to a preselected depth of Wet concrete. 272.565 241 

